Crushing-machine.



I. 138mm,

J, D. OCHTERBECK.

CRUSHING MACH-INE. APPLICANON min JAN.12.1914.

,Patented July 4, 1916.

Jenn D. ocnrnnnncx, or CLAYTON, Missoonr.

CRUSHNG-MACHIN.

specificati .ofI iters atent,

appueauon ana January 12, 1914. serial No. 811,602.

Clayton, Missouri, have invented a certain new and useful Improvement inCrushing- Machines, of which the following is a full, clear, and exactdescription, such as will enable others skilled in the art to which itappe'rtainsto make and'use the' same.

This invention relates to crushing machines, and more particularly tothat class of machines that are used for crushing or pulverizing largepieces of rock, ores, or other material. In machines of this characterthat have heretofore been-in'use, great ditliculty has been experiencedbecause of the constant breaking of the hammers, and the generalpractice has been, in order to partially `obviate this trouble, to passthe material through the machine several times in order to reduce it tovery small particles. This method, while preventing to some' extent thebreakage of the hammers, necessitates an vadjustment of thebreaker-plate with respect to the` path of the hammers, at eachoperatioh, thus materially increasing the time and labor spent inreducing large pieces of material to small particles.

The main object of my invention is to provide a 'machine of the classdescribed which is constructed in such a manner that large pieces ofmaterial may be broken or crushed into very small particles by asinglepassage therethrough.

Another object is to provide a machine of the class described in whichthe crushing hammers are mounted in such a manner that there is noliability of thembecoining broken contact with the material beingcrushed. Still "another object'is to provide mav.hine'of the v'3haracter described in which novel means is provided for yieldinglysupporting Vthe breaker plate and adjusting same with'respect to thepath of the crushing hammers.

A still further object is to provide a ma` chine of the class referredto that comprises Vfew simple parts that can he easily assembled ordismantled and which may be produced at a low cost of manufacture.

Other objects and desirable features oi my invention will be hereinafterpointed out.

Figure l of the drawings is an elevational view, partly in verticalsection, of a crush ing machine constructed in accordance with myinvention; and Fig. Q 1s a horizontal secentran estaras rafrnn'r enterenPatented July a', 19H3. l

tional view taken on the line 2 2 of Fig. l. *l

Referring to the drawings which illusf trate the preferred form of myinvention, A.'

designates the casing of themachine that'is i L provided in its upperportion with ra hopper l through which the material to be operated f i non is introduced into the machine, and at its l lower portionv with achute 2 whereby the disintegrated material is discharged from.,l

the machine.

A shaft extends transversely through,"

the casing A and carries a` hammer support Bin which are mounted aplurality of crush-A 170 ing hammers C. The hammers C may be4 connectedto the support B in various ways, I but l prefer 'to provide each ofsaid hammers with a reduced shank o having`a curved inv,

ner end that coperates with a correspondf,

ingly-curved pocket o formed in thesupf port B. A pin 4 is preferablypassedtrans-'yf versely through each of said Shanks and the,v

support B so as to pivotally connect said."l

to. retain, t

hammers to said support and also them in operative position therein.

As shown in Fig. 2, the heads c of the I I hammers C .preferably extendtransversely, across the entire distance between the side walls of thecasing A, and said hammers normally bear directly against abutnfientsL 5on the support B, but under certain conditionsin service, is desirableto have said hammers yield slightly, and to accomplish this, I provide aplurality of coiled eXpanthe support B; and a member 7 of any suitableelastic material, such as rubber, is pret-v erably arranged inside ofeach of said springs for purposes hereinafter appearing.v

The hammers C are adapted to rotatein the direction indicated by thearrow in Fig,

.90.. sion springs 6 that are arranged between l the rear edge of eachof the hammers C and uitl l operate with the inclined face e of avertitimes.

cally adjustable member E. A plurality of curved ribs e are arranged onthe rear wall of the member E and coperate with correspondingly curvedribs a integrally arranged on the vertical end wall of the casing A;,and said member E is also provided with one ormorehorizontally-disposed lugs 9 to which adjusting rods 10 are secured,said rods extending upwardly through the top wall of the casing A' andbeing provided at their upper ends with an adjusting nut ll that bearsagainst said top wall.

'IVhenever it is desired to change the position of the breaker-plateDwith respect to the path of the hammers C, the adjust` ing nut 1l isrotated so as to either raise or lower the member E, thus causing thebreaker-plate to swing about the pivot 8. The angle of the meeting facesof the member E and the plate D, of course, changes with suchadjustment, and the member E tilts or rocks about the curved rearbearing thereof, thus compensating for the change of angle of thebreaker-plate bearing surface, and insuring a perfectly fiat bearingbetween said plate and the member E at all In order to prevent thebreaker-plate from breaking when subjected to an unusual shock, Iprovide means whereby said plate can yield or give slightly at such atime, and, to this end, I form the member E of two separate and distinctparts e2 and e3 that are normally held spaced apart by a plurality ofcoiled expansion springs l2. Each of the parts e2 and e3 is providedwith laterally projecting overlapping flanges e4 that coperate to holdsaid parts in operative relationship and which permit of movement towardor away from each other.

By ,constructing the breaker-plate and its supporting structure in themanner just described, the liability of said plate becoming broken inservice is reduced to a minimum, and said plate can be easily andquickly adjusted from'a point outside ofthe casing of the machine.

In operation, the material to be crushed is introduced onto thebreaker-plate Dl through the feed-hopper 1, and the rapidlyrotatinghammers C come into `successive contact therewith, crushing saidmaterial 'and discharging the same from the machine by means of thechute 2.` The springs 6 and elastic members 7, which are -placed in'position behind the hammers C when under tension, only7 come intoservice when the4 hammers come into contact with the matic member T willyield and permit the hammer to aemain momentarily stationary withrespect to the support B, but on the reaction oi` said hammer, it willstrike `the piece of material with greater force than the initialimpact, owing to the fact that the expansion of the springs and elasticmembers is added to the constant speed of the hammer-support B. In otherwords, the support B is constantly rotating at a certain speed when inservice, and if one of the hammers carried by said support ismomentarily brought to rest by contact with a hard piece of material, itmust necessarily go forward after said stop at a greater speed thanbefore in order Ato catch up to the speed of the support B. The force ofthe reactive blow of said hammer is consequent-ly greater than theinitial impact, because of the additional speed and the additional powerexerted b v the compressed springs 6, the result being that large piecesof material being operated on are shattered and reduced to very smallparticles by a single passage through the machine.

By employing the combination kof the springs 6 and the contained elasticmembers 7, the hammers C are caused to operate against the greatresistance offered by said metallic springs, upon encountering a pieceof material that resists their initial impact, but upon the reaction,are acted upon immediately by the elastic members 7, as it has beenfound in actual practice that these members 7, formed of rubber or likematerial, will expand much more quickly than a metallic spring, and willtherefore cause the hammers C to give a sharper blow on v such a manneras to reduce to a minimuml the liability of breakage thereof, and it canbe produced at a low cost of manufacture. l

I am aware that many minor changes may be made in the construction andarrangement' of parts constituting my invention without departing in theleastfrom thev spirit thereof. l g l Having thus described my,invention, what I claim as new and desireto secure byv Letters Patentis:

1. In a crushin machine, a rotary hammer support, a p urality of hammerspivotally mounted in said support, said support havingintegral abutmentsthereon that 'limit the pivotal movement of said hammers in one"direction, and resilient means that limit the movement'm the oppositedirectioi, each of-said resilient means comprisv, ,part y fyieldingdevices, said wedge hav- .nice interposed between the rear edge o vlngone ace bearing against the inclined rear-. face of said breaker-plateandV its opposite face bearing against the end wall of the machine.. f

. 3; In a crushing machine, a rotary crushing element comprising a`solid one-piece hammer support, la plurality of pockets'arranged insaid head, crushing hammers provided with reduced shanks that arepivotally mounted in said kets, rigid means in vsaid kets}that linutsthe iv'otal movement o said hammers in one irection, and resilientImeans in said pockets that limits the movement inthe op osite direction.

4. Ina crushing mac ine, a rotary one piece hammer support providedwithja lurality of substantially semi-circular poc acmshinghammerrmounted -in each olf-said pockets, t mer being normally inenga ement with one end wall of said pocket, an a .yieldi diei sa hammerand the opposite end of said pocket. i

.5. In a crushing-machine, a rotary crushe advancing edge of said hain-vthis seventh day of Janna ing element, a breaker plate arran d adi oneend wall provided with a plurality ofv curved ribs, a breaker platehaving one end pivotall mounted in said machine adjacent said en wall, ayielding wedge interposed between said breaker plate and said curvedribs, and. means for causing said wedge to-` rock about said curvedribs.

7. In a disintegrating machine, a horizontally mounted rotating memberand an opposing jaw, the upper face of said working jaw being providedwith retarding projections and the lower portion with a grindingsurface,'said rotating member being provided with pivotally mountedheads, said heads having shock absorbing means.

In testimony whereof I hereunto aiiix m-y signature in the presence oftwo witnesses,

ry, 1914. JOHN D. OCHTERBECK. Witnesses:

Gnonon BAKEWELL, Gro. R. LAnsoN.

